I am a new engineer in automation industry.
For a while, I have tried to understand analog input & output signals and (differential , single ended wiring etc). I think , the reason of my being confused about these subjects is the usage of word " ground " for everything. I mean some says ground for both earth ground and common and I think it makes me confused.
For example, while I was learning about single ended and differential wiring. I saw that in single ended wiring measuring is made relative to ground. is this ground earth ground or common of power supply ? I attached an example photo taken from this website. As I know, the symbol used for "ground" in that photo is earth ground symbol but from my knowledge, it shows here common of power supply (I know depends on desire, it can tie or not tie to earth ground)
A friend of mine told me that "-" of analog input module is always tied to chassis ground inside module. Is it really "always" or it depends on choice ?
Thanks.
For a while, I have tried to understand analog input & output signals and (differential , single ended wiring etc). I think , the reason of my being confused about these subjects is the usage of word " ground " for everything. I mean some says ground for both earth ground and common and I think it makes me confused.
For example, while I was learning about single ended and differential wiring. I saw that in single ended wiring measuring is made relative to ground. is this ground earth ground or common of power supply ? I attached an example photo taken from this website. As I know, the symbol used for "ground" in that photo is earth ground symbol but from my knowledge, it shows here common of power supply (I know depends on desire, it can tie or not tie to earth ground)
A friend of mine told me that "-" of analog input module is always tied to chassis ground inside module. Is it really "always" or it depends on choice ?
Thanks.
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